com.stripe.model.ExpandableFieldDeserializer Maven / Gradle / Ivy
package com.stripe.model;
import com.google.gson.JsonDeserializationContext;
import com.google.gson.JsonDeserializer;
import com.google.gson.JsonElement;
import com.google.gson.JsonObject;
import com.google.gson.JsonParseException;
import com.google.gson.JsonPrimitive;
import java.lang.reflect.ParameterizedType;
import java.lang.reflect.Type;
public class ExpandableFieldDeserializer implements JsonDeserializer> {
/**
* Deserializes an expandable field JSON payload (i.e. either a string with just the ID, or a full
* JSON object) into an {@link ExpandableField} object.
*/
@Override
public ExpandableField deserialize(
JsonElement json, Type typeOfT, JsonDeserializationContext context)
throws JsonParseException {
if (json.isJsonNull()) {
return null;
}
ExpandableField expandableField;
// Check if json is a String ID. If so, the field has not been expanded, so we only need to
// serialize a String and create a new ExpandableField with the String id only.
if (json.isJsonPrimitive()) {
JsonPrimitive jsonPrimitive = json.getAsJsonPrimitive();
if (jsonPrimitive.isString()) {
expandableField = new ExpandableField<>(jsonPrimitive.getAsString(), null);
return expandableField;
} else {
throw new JsonParseException("ExpandableField is a non-string primitive type.");
}
// Check if json is an expanded Object. If so, the field has been expanded, so we need to
// serialize it into the proper typeOfT, and create an ExpandableField with both the String id
// and this serialized object.
} else if (json.isJsonObject()) {
// Get the `id` out of the response
JsonObject fieldAsJsonObject = json.getAsJsonObject();
String id = fieldAsJsonObject.getAsJsonPrimitive("id").getAsString();
// We need to get the type inside the generic ExpandableField to make sure fromJson correctly
// serializes the JsonObject:
Type clazz = ((ParameterizedType) typeOfT).getActualTypeArguments()[0];
expandableField = new ExpandableField<>(id, (HasId) context.deserialize(json, clazz));
return expandableField;
}
// If json is neither a String nor an Object, error. (We expect all expandable objects to fit
// the known string-or-object design. If one doesn't, then something may have changed in the API
// and this code may need to be updated.)
throw new JsonParseException("ExpandableField is a non-object, non-primitive type.");
}
}